[INFO] fetching crate witx-overview-docgen 0.1.2...
[INFO] building witx-overview-docgen-0.1.2 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate witx-overview-docgen 0.1.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate witx-overview-docgen 0.1.2
[INFO] finished tweaking crates.io crate witx-overview-docgen 0.1.2
[INFO] tweaked toml for crates.io crate witx-overview-docgen 0.1.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate witx-overview-docgen 0.1.2 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate witx-overview-docgen 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e1b0f52b08240be4db1f1eb4b71cdf7066b310db92dfd5ddf211e2101a42d1c
[INFO] running `Command { std: "docker" "start" "-a" "6e1b0f52b08240be4db1f1eb4b71cdf7066b310db92dfd5ddf211e2101a42d1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e1b0f52b08240be4db1f1eb4b71cdf7066b310db92dfd5ddf211e2101a42d1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e1b0f52b08240be4db1f1eb4b71cdf7066b310db92dfd5ddf211e2101a42d1c", kill_on_drop: false }`
[INFO] [stdout] 6e1b0f52b08240be4db1f1eb4b71cdf7066b310db92dfd5ddf211e2101a42d1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af507819385493d5c59d7d46049192927d8bd3daa42038bd8eda27adaa71eb42
[INFO] running `Command { std: "docker" "start" "-a" "af507819385493d5c59d7d46049192927d8bd3daa42038bd8eda27adaa71eb42", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling leb128 v0.2.4
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling wast v22.0.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling term_size v0.3.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling thiserror v1.0.21
[INFO] [stderr]    Compiling witx v0.8.7
[INFO] [stderr]    Compiling witx-overview-docgen v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/generator.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 292 |           return Ok(());
[INFO] [stdout]     |           ------------- any code following this expression is unreachable
[INFO] [stdout] 293 | /         if docs.is_empty() {
[INFO] [stdout] 294 | |             return Ok(());
[INFO] [stdout] 295 | |         }
[INFO] [stdout]     | |_________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `module_name`
[INFO] [stdout]    --> src/generator.rs:241:13
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let module_name = match self.module_name.as_ref() {
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_module_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `as_type`
[INFO] [stdout]    --> src/generator.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         as_type: &ASType,
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_as_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]    --> src/generator.rs:291:29
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_docs<T: Write>(w: &mut PrettyWriter<T>, docs: &str) -> Result<(), Error> {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `docs`
[INFO] [stdout]    --> src/generator.rs:291:54
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_docs<T: Write>(w: &mut PrettyWriter<T>, docs: &str) -> Result<(), Error> {
[INFO] [stdout]     |                                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_nullable` is never used
[INFO] [stdout]   --> src/astype.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl ASType {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 61 |     pub fn is_nullable(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Witx(WitxError),
[INFO] [stdout]   |     ---- ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     Witx(WitxError),
[INFO] [stdout] 6 +     Witx(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Io(std::io::Error),
[INFO] [stdout]   |     -- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Io(std::io::Error),
[INFO] [stdout] 7 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `continuation_bytes` is never read
[INFO] [stdout]   --> src/pretty_writer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct PrettyWriter<W: Write> {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     continuation_bytes: &'static str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `continuation` is never used
[INFO] [stdout]    --> src/pretty_writer.rs:106:12
[INFO] [stdout]     |
[INFO] [stdout]  27 | impl<W: Write> PrettyWriter<W> {
[INFO] [stdout]     | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn continuation(&mut self) -> Result<&mut Self, Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.30s
[INFO] running `Command { std: "docker" "inspect" "af507819385493d5c59d7d46049192927d8bd3daa42038bd8eda27adaa71eb42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af507819385493d5c59d7d46049192927d8bd3daa42038bd8eda27adaa71eb42", kill_on_drop: false }`
[INFO] [stdout] af507819385493d5c59d7d46049192927d8bd3daa42038bd8eda27adaa71eb42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dbfdf75e563ee275b40bf75b6235317a0f9397cce795d1b5d06ddc30b87811a
[INFO] running `Command { std: "docker" "start" "-a" "1dbfdf75e563ee275b40bf75b6235317a0f9397cce795d1b5d06ddc30b87811a", kill_on_drop: false }`
[INFO] [stderr]    Compiling witx-overview-docgen v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/generator.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 292 |           return Ok(());
[INFO] [stdout]     |           ------------- any code following this expression is unreachable
[INFO] [stdout] 293 | /         if docs.is_empty() {
[INFO] [stdout] 294 | |             return Ok(());
[INFO] [stdout] 295 | |         }
[INFO] [stdout]     | |_________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `module_name`
[INFO] [stdout]    --> src/generator.rs:241:13
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let module_name = match self.module_name.as_ref() {
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_module_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `as_type`
[INFO] [stdout]    --> src/generator.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         as_type: &ASType,
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_as_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]    --> src/generator.rs:291:29
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_docs<T: Write>(w: &mut PrettyWriter<T>, docs: &str) -> Result<(), Error> {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `docs`
[INFO] [stdout]    --> src/generator.rs:291:54
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn write_docs<T: Write>(w: &mut PrettyWriter<T>, docs: &str) -> Result<(), Error> {
[INFO] [stdout]     |                                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_nullable` is never used
[INFO] [stdout]   --> src/astype.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl ASType {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 61 |     pub fn is_nullable(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Witx(WitxError),
[INFO] [stdout]   |     ---- ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     Witx(WitxError),
[INFO] [stdout] 6 +     Witx(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `continuation_bytes` is never read
[INFO] [stdout]   --> src/pretty_writer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct PrettyWriter<W: Write> {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     continuation_bytes: &'static str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `continuation` is never used
[INFO] [stdout]    --> src/pretty_writer.rs:106:12
[INFO] [stdout]     |
[INFO] [stdout]  27 | impl<W: Write> PrettyWriter<W> {
[INFO] [stdout]     | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn continuation(&mut self) -> Result<&mut Self, Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Io(std::io::Error),
[INFO] [stdout]   |     -- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Io(std::io::Error),
[INFO] [stdout] 7 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "1dbfdf75e563ee275b40bf75b6235317a0f9397cce795d1b5d06ddc30b87811a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dbfdf75e563ee275b40bf75b6235317a0f9397cce795d1b5d06ddc30b87811a", kill_on_drop: false }`
[INFO] [stdout] 1dbfdf75e563ee275b40bf75b6235317a0f9397cce795d1b5d06ddc30b87811a